Whitehall Bio Weed Control: Whitetop/Hoary Cress

You might notice clusters of small white flowers as you drive along your hometown roads and gaze out your window. You might even notice these flowers in your backyard. This species is not welcome in Montana, and it is categorized as a noxious weed in 23 other states. The term, noxious weed, refers to a weed that has been designated a harmful weed to natural habitats and crops by a governing authority. This persistent perennial is known as whitetop, or hoary cress (Lepidium drabae). Brought here from Eurasia in the 19th century, whitetop continues infiltrating crop lands, open fields, and heavi...